Foreground p.20 A DC-TO-DC CONVERTER [author Michael Picco] Here's a simple converter that uses a standard integrated circuit for producing a 25 mA bipolar source from a single-ended power supply. p.22 I/O EXPANSION FOR THE RADIO SHACK TRS-80, Part 1: Principles of Parallel Ports [author Steve Ciarcia] This month Steve explains the operation of parallel input/output as a prelude to next month's design for an economical RS-232C interface. p.44 KIMDOS, Using Your KIM-1 with a Percom Floppy-Disk Drive [author Joel Swank] Using the LFD-400 disk-controller board, the KIM-1 can access up to 87.5 K data bytes on several 5-inch hard-sectored floppy-disk drives. p.72 INTERFACE A FLOPPY-DISK DRIVE TO AN 8080A-BASED COMPUTER [author John Hoeppner] Building a disk-controller board for a Shugart SA400 disk drive can be done easily and with commonly available parts. p.196 GIVE YOUR COMPUTER AN EAR FOR NAMES [author Tom Munnecke] With the Soundex code, you can locate people's names in your data base by similar, but not exact, spellings. p.214 THE COSMAC DOODLER [author Jeff Duntemann] An electronic sketchpad? Even a small system like the COSMAC ELF can draw designs using a video display. p.250 ERROR CHECKING AND CORRECTING FOR YOUR COMPUTER [author Gregory J Walker] Storage devices can introduce data errors. The system presented here can increase reliability and speed of these peripherals. Background p.12 THE CASSETTE LIVES ON, An Alternative to Floppy-Disk Mass Storage [author Emory Cook] Floppy disks may be the glamorous way to store programs and data, but the cassette is far from obsolete. p.104 A GRAPHICS TEXT EDITOR FOR MUSIC, Part 2: Algorithms [author Randolph Nelson] The conclusion of this article sets forth the routines to create and use the various arrays described in part 1. p.120 USING THE COMPUTER AS A MUSICIAN'S AMANUENSIS, Part 2: Going from Keyboard to Printed Score [author Jef Raskin] Part 2 continues the examination of the subtle problems encountered when translating information from performance to written score. p.130 COMPARING FLOPPY-DISK DRIVES BY SOFTWARE SIMULATION [author Dennis Nendza] Now you can get some idea of the relative performance of different units by simulating their mechanical functions in a BASIC program, p.202 THE CLUB COMPUTER NETWORK [author Joe Kasser] If your club is considering to form a program- and data-exchange network, the telephone and amateur radio links described here will be a valuable source of ideas.
Nucleus p.6 Editorial: Computer-Controlled Viewing of the 1980 Eclipse p.8 Letters p.144 BYTELINES (formerly BYTE News) p.152 Technical Forum Simplifying the Curve-Plotting Calculation by Geometric Means Alpha Locking in Software Maintaining a Single Exit Point p.190 Programming Quickies Decisions, Decisions Formatted Program Output for the KIM-1 p.226 Book Reviews p.230 Clubs and Newsletters p.234 BYTE's Bits p.236 BYTE's Bugs p.238 Event Queue p.280 NCC Information p.286 What's New? p.335 Unclassified Ads, BOMB Results p.336 Reader Service, BOMB